The United Socialist Party of Venezuela won at least 17 of the 23 governorships, also garnering 54 percent of the vote.

U.S. Ambassador to the United Nations, Nikki Haley, cast doubt on the results of Venezuela's Regional Elections where candidates from the governing Socialist Party won a vast majority of seats, claiming the vote was not "free and fair."

"An election is only legitimate if it is free and fair, and from the start, this was neither," Haley said via the U.S. mission to the United Nations Twitter account.

The United Socialist Party of Venezuela, or PSUV won at least 17 of the 23 governorships, also garnering 54 percent of the vote. The PSUV candidate for Bolivar state, where no official results have been declared yet, also claimed victory.

Prior to the vote, the U.S. State Department issued a statement questioning the "fairness of the electoral process" in Venezuela, and expressing "great concern that the regime will not permit the presence of independent international electoral observers."

Over 1,300 national and international observers, including opposition appointed auditors, were on hand for the Oct. 15 vote. An audit of the vote will also be held, election officials confirmed Monday.

The U.S.-backed opposition meanwhile, has stated they would not recognize the results that have been reported by the head of the National Electoral Council (CNE), Tibisay Lucena.